quadtree terrain
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parent
42a4358df1
commit
8232dcebd2
GPG Key ID:
1688DA83D222D0B5
@ -96,7 +96,7 @@ export class Game {
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this.thirdPersonCamera?.update(dt);
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this.joystick?.update(dt);
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this.world?.update(dt);
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this.player && this.world?.update(this.player.container.position);
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}
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bindSocket() {
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@ -1,19 +1,17 @@
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import { Mesh, Object3D, Vector3 } from 'three';
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import { Object3D, Vector2, Vector3 } from 'three';
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import { WorldChunk } from '../../../common/world/WorldChunk';
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import { WorldManager } from '../../../common/world/WorldManager';
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import { ClientWorldChunkShader } from './ClientWorldChunkShader';
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import { ClientWorldMesher } from './ClientWorldMesher';
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import { ClientWorldTexture } from './ClientWorldTexture';
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import { QuadtreeMesher } from './quadtree/quadtree-mesher';
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// TODO: distance loading
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// TODO: LOD
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const BASE = '/assets/terrain/';
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export class ClientWorld extends WorldManager {
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public world = new Object3D();
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private _mesher = new ClientWorldMesher();
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private _chunkMeshes: Mesh[] = [];
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private _chunkMeshers: QuadtreeMesher[] = [];
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private _chunkMeshQueue: WorldChunk[] = [];
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private _worldTextures: Map<string, ClientWorldTexture> = new Map();
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private _shader = new ClientWorldChunkShader(this._worldTextures);
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@ -62,7 +60,7 @@ export class ClientWorld extends WorldManager {
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}
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}
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update(dt: number) {
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update(camera: Vector3) {
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if (this._chunkMeshQueue.length) {
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const chunk = this._chunkMeshQueue.shift();
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const material = this._shader.getShader(
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@ -71,16 +69,22 @@ export class ClientWorld extends WorldManager {
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chunk.region.splat.map((file) => `${BASE}/texture/${file}`),
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);
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const mesh = this._mesher.createTerrainMesh(
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chunk,
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const root = new QuadtreeMesher(
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chunk.size,
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new Vector2(chunk.size * chunk.x, chunk.size * chunk.y),
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material,
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this.getHeight.bind(this),
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this.getNormalVector.bind(this),
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);
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this._chunkMeshes.push(mesh);
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this.world.add(mesh);
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root.getHeight = this.getInterpolatedHeight.bind(this);
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root.getNormal = this.getNormalVector.bind(this);
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root.initialize();
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this._chunkMeshers.push(root);
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this.world.add(root.container);
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return;
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}
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this._chunkMeshers.forEach((item) => item.update(camera));
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}
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private createMeshes() {
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@ -1,75 +0,0 @@
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import {
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BufferGeometry,
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Float32BufferAttribute,
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Material,
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Mesh,
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Vector3,
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} from 'three';
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import { WorldChunk } from '../../../common/world/WorldChunk';
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export class ClientWorldMesher {
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public createGeometry(
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chunk: WorldChunk,
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getHeight: (x: number, y: number) => number,
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getNormal: (x: number, y: number) => Vector3,
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): BufferGeometry {
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const geometry = new BufferGeometry();
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const vertices = [];
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const normals = [];
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const indices = [];
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const uvs = [];
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for (let x = 0; x < chunk.size; x++) {
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for (let y = 0; y < chunk.size; y++) {
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const normal = getNormal(y, x);
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vertices.push(
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(y / chunk.size - 1) * chunk.size,
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getHeight(y, x),
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(x / chunk.size - 1) * chunk.size,
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);
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normals.push(normal.x, normal.y, normal.z);
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uvs.push(y / (chunk.size - 1), x / (chunk.size - 1));
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}
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}
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for (let x = 0; x < chunk.size - 1; x++) {
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for (let y = 0; y < chunk.size - 1; y++) {
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const topLeft = x * chunk.size + y;
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const topRight = topLeft + 1;
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const bottomLeft = (x + 1) * chunk.size + y;
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const bottomRight = bottomLeft + 1;
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indices.push(
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topLeft,
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bottomLeft,
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topRight,
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topRight,
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bottomLeft,
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bottomRight,
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);
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}
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}
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geometry.setIndex(indices);
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geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
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geometry.setAttribute('normal', new Float32BufferAttribute(normals, 3));
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geometry.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
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return geometry;
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}
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public createTerrainMesh(
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chunk: WorldChunk,
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material: Material,
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getHeight: (x: number, y: number) => number,
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getNormal: (x: number, y: number) => Vector3,
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): Mesh {
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const geometry = this.createGeometry(chunk, getHeight, getNormal);
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const mesh = new Mesh(geometry, material);
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mesh.position.set(
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chunk.size * (chunk.x + 1),
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0,
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chunk.size * (chunk.y + 1),
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);
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return mesh;
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}
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}
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26
src/client/object/world/quadtree/quadtree-mesher.ts
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26
src/client/object/world/quadtree/quadtree-mesher.ts
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@ -0,0 +1,26 @@
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import { Material, Object3D, Vector2, Vector3 } from 'three';
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import { QuadtreeNode } from './quadtree-node';
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export class QuadtreeMesher {
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public getHeight!: (x: number, y: number) => number;
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public getNormal!: (x: number, y: number) => Vector3;
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public root!: QuadtreeNode;
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public container = new Object3D();
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public actionsLeft = 1;
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public maxDepth = 3;
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constructor(
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public size: number,
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public position: Vector2,
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public material: Material,
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) {}
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public update(camera: Vector3) {
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this.actionsLeft = 1;
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this.root?.update(camera);
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}
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public initialize() {
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this.root = new QuadtreeNode(this, null, 0, 0, this.position.clone());
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}
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}
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286
src/client/object/world/quadtree/quadtree-node.ts
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286
src/client/object/world/quadtree/quadtree-node.ts
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@ -0,0 +1,286 @@
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import {
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BufferGeometry,
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Float32BufferAttribute,
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Mesh,
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Vector2,
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Vector3,
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} from 'three';
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import { QuadtreeMesher } from './quadtree-mesher';
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export enum LODQuadrant {
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TOP_LEFT,
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TOP_RIGHT,
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BOTTOM_RIGHT,
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BOTTOM_LEFT,
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}
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export enum LODSide {
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TOP,
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RIGHT,
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BOTTOM,
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LEFT,
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}
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export function mirrorSide(x: number): number {
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return (x + 2) % 4;
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}
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export function isAdjacent(s: number, q: number): boolean {
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return (4 + q - s) % 4 <= 1;
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}
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export function reflectSide(s: number, q: number): number {
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return s % 2 ? (q % 2 ? q - 1 : q + 1) : 3 - q;
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}
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export class QuadtreeNode {
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public _children: QuadtreeNode[] = [];
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public _neighbors: QuadtreeNode[] = [];
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private _leaf = true;
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private _mesh?: Mesh;
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constructor(
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public root: QuadtreeMesher,
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public parent: QuadtreeNode,
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public level: number,
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public quadrant: number,
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public position: Vector2,
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) {}
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public dispose() {
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if (this._mesh) {
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this._destroyMesh();
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}
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this._children.forEach((child) => child.dispose());
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this._children.length = 0;
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}
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public isMeshed() {
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return !!this._mesh;
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}
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public update(camera: Vector3) {
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if (this.root.actionsLeft === 0) {
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return;
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}
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const size = this.root.size / Math.pow(2, this.level);
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const abs = new Vector3(
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this.position.x + size / 2,
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camera.y,
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this.position.y + size / 2,
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);
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if (this._leaf) {
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if (abs.distanceTo(camera) < size && this._canSubdivide()) {
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this._subdivide();
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this.root.actionsLeft -= 1;
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return;
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}
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if (!this._mesh) {
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this._createMesh();
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this.root.actionsLeft -= 1;
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return;
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}
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} else if (!this._leaf) {
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if (abs.distanceTo(camera) > size) {
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this._merge();
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this.root.actionsLeft -= 1;
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}
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if (
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this.isMeshed() &&
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this._children.every((child) => child.isMeshed())
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) {
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this._destroyMesh();
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}
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this._children.forEach((child) => child.update(camera));
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}
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}
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public setNeighbor(side: LODSide, neighbor: QuadtreeNode) {
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this._neighbors[side] = neighbor;
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neighbor._neighbors[mirrorSide(side)] = this;
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}
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public findNeighbor(side: LODSide) {
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if (!this._neighbors[side] && this.parent && this.parent._neighbors[side]) {
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const neighbor =
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this.parent._neighbors[side]?._children[
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reflectSide(side, this.quadrant)
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];
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if (neighbor) {
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this.setNeighbor(side, neighbor);
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} else {
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return;
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}
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}
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if (!this._leaf) {
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for (let i = 0; i < 4; i++) {
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if (isAdjacent(side, i)) {
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this._children[i].findNeighbor(side);
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}
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}
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}
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}
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private _createGeometry(): BufferGeometry {
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const apparentSize = this.root.size / Math.pow(2, this.level);
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const vertCount =
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this.root.size / Math.pow(2, this.root.maxDepth - this.level);
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const divisionLevel = Math.pow(2, this.level);
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const geometry = new BufferGeometry();
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const vertices = [];
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const normals = [];
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const indices = [];
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const uvs = [];
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for (let x = 0; x < vertCount; x++) {
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for (let y = 0; y < vertCount; y++) {
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const vertDivj = y / (vertCount - 1);
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const vertDivi = x / (vertCount - 1);
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const absX = this.position.x + (y / (vertCount - 1)) * apparentSize;
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const absY = this.position.y + (x / (vertCount - 1)) * apparentSize;
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const normal = this.root.getNormal(absX, absY);
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// Calculate relative resolution
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const pj = vertDivj * (this.root.size / divisionLevel);
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const pi = vertDivi * (this.root.size / divisionLevel);
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vertices.push(pj, this.root.getHeight(absX, absY), pi);
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normals.push(normal.x, normal.y, normal.z);
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uvs.push(absX / (this.root.size - 1), absY / (this.root.size - 1));
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}
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}
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for (let x = 0; x < vertCount - 1; x++) {
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for (let y = 0; y < vertCount - 1; y++) {
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const topLeft = x * vertCount + y;
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const topRight = topLeft + 1;
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const bottomLeft = (x + 1) * vertCount + y;
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const bottomRight = bottomLeft + 1;
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indices.push(
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topLeft,
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bottomLeft,
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topRight,
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topRight,
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bottomLeft,
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bottomRight,
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);
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}
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}
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geometry.setIndex(indices);
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geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
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geometry.setAttribute('normal', new Float32BufferAttribute(normals, 3));
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geometry.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
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return geometry;
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}
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private _merge(): boolean {
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if (this._leaf) {
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return false;
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}
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this._children.forEach((child) => child.dispose());
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this._children.length = 0;
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this._leaf = true;
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return true;
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}
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private _subdivide(): boolean {
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if (!this._canSubdivide()) {
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return false;
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}
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const level = this.level + 1;
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const stepLeft = this.root.size / Math.pow(2, level);
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const stepForward = this.root.size / Math.pow(2, level);
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const { x, y } = this.position;
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// Create children
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this._children[LODQuadrant.TOP_LEFT] = new QuadtreeNode(
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this.root,
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this,
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level,
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LODQuadrant.TOP_LEFT,
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new Vector2(x, y),
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);
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this._children[LODQuadrant.TOP_RIGHT] = new QuadtreeNode(
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this.root,
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this,
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level,
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LODQuadrant.TOP_RIGHT,
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new Vector2(stepLeft + x, y),
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);
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this._children[LODQuadrant.BOTTOM_RIGHT] = new QuadtreeNode(
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this.root,
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this,
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level,
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LODQuadrant.BOTTOM_RIGHT,
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new Vector2(stepLeft + x, stepForward + y),
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);
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this._children[LODQuadrant.BOTTOM_LEFT] = new QuadtreeNode(
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this.root,
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this,
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level,
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LODQuadrant.BOTTOM_LEFT,
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new Vector2(x, stepForward + y),
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);
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// Set sibling neighbors
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this._children[LODQuadrant.TOP_LEFT].setNeighbor(
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LODSide.RIGHT,
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this._children[LODQuadrant.TOP_RIGHT],
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);
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this._children[LODQuadrant.TOP_RIGHT].setNeighbor(
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LODSide.BOTTOM,
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this._children[LODQuadrant.BOTTOM_RIGHT],
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);
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this._children[LODQuadrant.BOTTOM_RIGHT].setNeighbor(
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LODSide.LEFT,
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this._children[LODQuadrant.BOTTOM_LEFT],
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);
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this._children[LODQuadrant.BOTTOM_LEFT].setNeighbor(
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LODSide.TOP,
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this._children[LODQuadrant.TOP_LEFT],
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);
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// set adjacent neighbors
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for (let i = 0; i < 4; i++) {
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if (this._neighbors[i] && !this._neighbors[i]._leaf) {
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this._neighbors[i].findNeighbor(mirrorSide(i));
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}
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}
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this._leaf = false;
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return true;
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}
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private _createMesh() {
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if (this._mesh) {
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this.root.container.remove(this._mesh);
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this._mesh = null;
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}
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const geometry = this._createGeometry();
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const mesh = new Mesh(geometry, this.root.material);
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mesh.position.set(this.position.x, 0, this.position.y);
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this.root.container.add(mesh);
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this._mesh = mesh;
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}
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private _destroyMesh() {
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this.root.container.remove(this._mesh);
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this._mesh = null;
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}
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private _canSubdivide() {
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return this._leaf && this.level < this.root.maxDepth - 1;
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}
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}
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